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Infrastructure Complexity
Figure 3 | Infrastructure Complexity

Figure 3

From: Improving measures of topological robustness in networks of networks and suggestion of a novel way to counter both failure propagation and isolation

Figure 3

One example case of the influence of node permutability on post attack viability. We use a permutable node in components with the following symbiotic viability condition: a component is only alive if at least 1/3 of its nodes are connected to other network. The large network diagrams on the left represent the two different alternative networks made possible by swapping the states of the permutable node. In the first alternative scenario, this uncoupled node can be activated in the grey network, with an extra internal (blue) edge. In the second alternative situation, the grey network node is disabled and the node counter-part in the black network is activated. Disabled nodes and connections in each alternative scenario are shown with dashed lines. After applying the post-attack viability rule, alternative 2 seems to leave the coupled networks in a much better state than alternative 1.

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